摘要
我国的小型陆相含煤盆地往往同时发育油页岩,这些共伴生的油页岩资源通常无法单独开发利用,为了促进这类油页岩资源的利用,以黑龙江省老黑山盆地油页岩为例,基于油页岩钻井资料和测试分析,开展了油页岩的富集与分布特征研究,并分析了两者对勘探开发的指示意义。研究结果表明,老黑山盆地油页岩有机质丰度高(总有机碳:16.05%~42.05%),为Ⅱ型干酪根,处于未成熟阶段,属于低灰分、高发热量、特低硫、中等品质油页岩,主要组成矿物为黏土矿物(以高岭石为主),主要组成元素为SiO_(2)和Al_(2)O_(3)。油页岩形成于温暖湿润气候背景下贫氧的半咸水环境,低湖泊生产力提供的内源有机质和稳定陆源输入携带的外源有机质共同组成了油页岩形成的物质基础。研究区油页岩主要分布于盆地西部,埋藏深度浅,其厚度和含油率具有中间高四周低的特点。其中老黑山镇—永盛—九佛沟一带为油页岩主要富集区和有利目标区。N7油页岩与全区可采煤层8号煤层伴生发育,为开发有利层位。根据N7油页岩的含油率、厚度和埋深以及8号煤层的厚度进一步将有利目标区划分为Ⅰ~Ⅴ五类,其中Ⅰ类区的8号煤层和N7油页岩层厚度大,埋藏深度浅,油页岩含油率高,为最有利区。研究结果为老黑山盆地油页岩以及与煤伴生油页岩未来的勘探、开发和利用提供了依据。
Oil shale often developed in small coal-bearing continental basins in China,but these resources are challenging to develop and utilize independently.To promote the utilization of such oil shale resources,this study examines the oil shale from the Laoheishan basin in Heilongjiang Province as a research example.The enrichment and distribution characteristics of the oil shale and their indicative significance for exploration and development were analyzed based on drilling data and laboratory analyses.The research results indicate that the oil shale in the Laoheishan basin exhibits high organic matter abundance(total organic carbon:16.05%~42.05%),with type II kerogen and immature thermal maturity.The shale has low ash content,high calorific value,ultra-low sulfur content,and medium quality.Mineralogically,it is mainly composed of clay minerals,primarily kaolinite,with SiO_(2) and Al_(2)O_(3) as the major elemental components.The oil shale formed in a brackish water environment under warm and humid climate conditions,with dysoxic depositional conditions.Its material basis consists of endogenous organic matter from low lake productivity and exogenous organic matter derived from stable terrestrial inputs.The oil shale in the study area is mainly distributed in the western part of the basin,with shallow burial depth.Its thickness and oil yield exhibit a central high-to-peripheral low trend.The Laoheishan-Yongsheng-Jiufogou area is identified as the main enrichment zone and the most favorable target for oil shale exploration.The N7 oil shale layer is associated with the mineable 8th coal seam,making it a particularly favorable layer for development.Based on the oil yield,thickness,and burial depth of the N7 oil shale,as well as the thickness of the 8th coal seam,the favorable area is further divided into five categories.The Category I area is the most favorable,as both the 8th coal seam and N7 oil shale have large thickness,shallow burial depth,and the N7 oil shale have high oil yield.The research results provide a basis for the future exploration,development,and utilization of oil shale in the Laoheishan basin and other basins where coal and oil shale coexist.
作者
徐银波
方石
张培震
宋宇
毕彩芹
孙平昌
姚树青
李耀华
孙凡星
唐跃
XU Yinbo;FANG Shi;ZHANG Peizhen;SONG Yu;BI Caiqin;SUN Pingchang;YAO Shuqing;LI Yaohua;SUN Fanxing;TANG Yue(College of Earth Sciences,Jilin University,Changchun,Jilin 130061,China;Oil and Gas Survey,China Geological Survey,Beijing 100083,China;State Key Laboratory of Continental Shale Oil,Beijing 100083,China;School of Earth Sciences and Engineering,Sun Yat-Sen University,Guangzhou,Guangdong 510275,China;Key Laboratory of Tectonics and Petroleum Resources,Ministry of Education,China University of Geosciences(Wuhan),Wuhan,Hubei 430074,China;Geoscience Documentation Center,China Geological Survey,Beijing 100083,China;Shandong Institute of Coalfield Geological Planning and Investigation,Jinan,Shandong 250100,China)
出处
《地质学报》
北大核心
2025年第8期2848-2863,共16页
Acta Geologica Sinica
基金
中国地质调查局项目(编号DD20242509,DD202402010)
国家自然科学基金项目(编号52374010,41472173)联合资助的成果。
关键词
下白垩统
穆棱组
油页岩
陆相含煤盆地
老黑山盆地
Lower Cretaceous
Muling Formation
oil shale
coal-bearing continental basin
Laoheishan basin
作者简介
徐银波,男,1987年生。高级工程师,主要从事非常规油气富集理论、沉积学、层序地层学研究。E-mail:xuyinbo87@126.com;通讯作者:方石,男,1974年生。副教授,主要从事油气勘探、沉积学和构造热年代学方面研究。E-mail:fs812625@vip.sina.com。
